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package com.google.jgments;

import java.util.regex.Matcher;
import java.util.regex.Pattern;

/** Holds a regex to apply and actions to be performed if the regex matches. */
public class TokenMatcher {

  /** The compiled regular expression to attempt to match against input text. */
  private final Pattern pattern;
  /** The token-yielding action to apply if the regex matches. */
  private final TokenActions.Action tokenAction;
  /** The state transition action to apply if the regex matches. */
  private final StateActions.Action stateAction;

  public TokenMatcher(String regex, TokenActions.Action tokenAction,
      StateActions.Action stateAction) {
    // TODO(jacobly): support other regex types besides multiline.
    this.pattern = Pattern.compile(regex, Pattern.MULTILINE);
    this.tokenAction = tokenAction;
    this.stateAction = stateAction;
  }

  public Matcher getMatcher(String toMatch) {
    return pattern.matcher(toMatch);
  }

  public TokenActions.Action getTokenAction() {
    return tokenAction;
  }

  public StateActions.Action getStateAction() {
    return stateAction;
  }

}
